<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <button id="btn">获取电影列表<button>
    <ul id="ul"></ul>

    <script>
        let btn = document.getElementById('btn');
        let ul  = document.getElementById('ul');
        btn.addEventListener('click',() =>{
            // 朝后端发一个请求，获取到需要的数据
            let xhr = new XMLHttpRequest();// 创建了一个ajax实例
            xhr.open('GET','https://mock.mengxuegu.com/mock/65a91543c4cd67421b34c898/movie/movieList',true);
            xhr.send()
            xhr.onreadystatechange = () =>{// 检测请求的每个阶段
                if(xhr.readyState == 4 && xhr.status == 200){
                    console.log(JSON.parse(xhr.responseText));
                    const movieList = JSON.parse(xhr.responseText).movieList;

                    for(let i=0; i<movieList.length; i++){
                        const li = document.createElement('li');
                        li.innerText = `${movieList[i].nm} -- ${movieList[i].star}` //movieList[i].nm+"--"+movieList[i].star;
                        ul.appendChild(li)
                    }
                    
                }
            }
        })
    </script>
</body>
<html>